not really cal . i have talked with rusty a few times about his amps ,he tells me that they do use better parts on all the dc amps ,hence the price difference ,weather or not that makes them better is what he believes .all i know is that i have ran both ,4 channels and the big mono blocks ,my ab amps did get a bit warm ,but never hot or anything to be worried about ,my dc amps always ran cool .same subs ,same batteries,same alts ,exact same build all around except an amp change.will i run either one again ? yes i will both are great amps that produce a ton of power.i just think the dc amps were a bit better .only reason why i changed to ab over dc ,was that i was due for a change which i always do once or twice a year .always trying new amps and subs ,because thats what we do .